Waterproof inductive charging paddle

Details Waterproof inductive charging paddle Waterproof inductive charging paddle

2000-12-01

2002-03-12

Tso, Edward H. (Department: 2838)

Electricity: battery or capacitor charging or discharging

Cell or battery charger structure

Charger inductively coupled to cell or battery

Reexamination Certificate

active

06356052

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a waterproof structure for charging paddles used in inductive battery chargers.
Generally, there is an induction method for charging batteries in electric vehicles. According to this charging method, as shown in
FIG. 6
, a charging paddle
50
is connected to a cable
63
extending from a power supply unit. The paddle
50
is inserted to a receptacle
51
of a vehicle to charge a battery.
The charging paddle
50
is provided with a primary core
52
and a primary coil
53
. The receptacle
51
is provided with a secondary core
54
and a secondary coil
55
. The charging paddle
50
is inserted to a slot
56
of the receptacle
51
. An alternating current supplied from the power supply unit flows through the primary coil
53
to generate an electromotive force in the secondary coil
55
by electromagnetic induction. The battery in the vehicle is charged based on this electromotive force.
The charging paddle
50
has an insert head
57
that is inserted in the slot
56
of the receptacle
51
and a grip
58
, which is gripped by an operator. The insert head
57
includes the primary core
52
, the primary coil
53
and a circuit board
59
having a communication device. The communication device carries out wireless communication with a communication device
60
in the receptacle
51
. The communication device in the charging paddle
50
receives information about the vehicle, including the battery capacity, through this communication.
The charging paddle
50
has a housing
62
formed by welding two housing components
61
. The cable
63
is introduced into the housing
62
through a lead-in hole defined in the grip
58
. A waterproof grommet
64
is fitted in the lead-in hole. The grommet
64
prevents water from entering the housing
62
.
However, for example, if it happens that an operator drops the charging paddle
50
and cracks the housing
62
, water may penetrate the housing
62
. Also, if the cable
63
is pulled very strongly, the waterproof grommet
64
fails to fully seal the lead-in hole, and water may enter the housing
62
through the lead-in hole. Therefore, the circuit board
59
may get wet.
SUMMARY OF THE INVENTION
It is an objective of the present invention to provide a waterproof structure for an inductive charging paddle, which prevents the circuit board from becoming wet, even if water enters the housing of the charging paddle.
In order to attain the above objective, the present invention provides an induction type charging paddle for engaging a receptacle to charge a battery. The charging paddle comprises a housing, a circuit board which is used for controlling the charging of the battery, and a case which is located in the housing to accommodate the circuit board. The case is sealed to prevent the circuit board from becoming wet.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, which illustrate by way of examples the principles of the invention.


REFERENCES:
patent: 5412304 (1995-05-01), Abbott

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